Performance
· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.16 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.10 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
169 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.17 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
5.94 s
Page Load Progression
FPage Weight BudgetAction4.7 MB transferred, 234 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2144ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/285j93odz-mc6.js | 876ms | 684ms | 7ms | 3rd |
| https://vercel.com/ | 484ms | 55ms | 26ms | 3rd |
| Unattributable | 303ms | 13ms | 0ms | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/2n1seda456yr8.js | 281ms | 203ms | 4ms | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/1jzv8nh4kvk-b.js | 85ms | 78ms | 6ms | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/2m1696-0wail1.js | 62ms | 1ms | 2ms | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/2f38e0-rib6v3.js | 52ms | 1ms | 51ms | 3rd |
FJS BundlesAction153 scripts, 2.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/2f38e0-rib6v3.js | 412 KB | 410 KB (100%) | ✓ | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/1gptraxt1ey_y.js | 313 KB | 313 KB (100%) | ✓ | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/3wv1xzq7oleku.js | 176 KB | 175 KB (100%) | ✓ | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/13cxx4bvuuily.js | 132 KB | 131 KB (100%) | ✓ | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/2z67bsiod5ud-.js | 110 KB | 110 KB (100%) | ✓ | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/3cboegxsas_wa.js | 100 KB | 99 KB (99%) | ✓ | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/0-yecpdkl3vib.js | 102 KB | 68 KB (69%) | ✓ | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/3c8717u582s3v.js | 50 KB | 49 KB (99%) | ✓ | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/3m3duol34qvrp.js | 63 KB | 49 KB (78%) | ✓ | 3rd |
| https://vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/2tnyci7ul9ujx.js | 50 KB | 39 KB (83%) | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction234 resources · 4.7 MB · 2.1 MB savings availableFIX
~2.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 234 resources | 4.7 MiB | ||||||
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CCompression AlgorithmActionMain response served uncompressedREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingpublic, max-age=0, must-revalidateREVIEW
public, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization1 images, 0 KB saveablePASS
A+Font Loading3 fonts (59 KB)PASS
Web fonts
3
59 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML max-age=0 (≤ 5min) is appropriatePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
Network Waterfall234 requests over 3079msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
vercel.com vercel.com | Other | 876ms | 64 KB | — | €15/mo | Costly |
vercel.com vercel.com | Other | 484ms | 51 KB | — | €8/mo | Costly |
Unattributable Unattributable | Other | 303ms | 0 KB | — | €5/mo | Costly |
vercel.com vercel.com | Other | 281ms | 31 KB | — | €5/mo | Costly |
vercel.com vercel.com | Other | 85ms | 48 KB | — | €1/mo | Optional |
vercel.com vercel.com | Other | 62ms | 27 KB | — | €1/mo | Optional |
vercel.com vercel.com | Other | 52ms | 412 KB | 100% | €1/mo | Optional |
These scripts may cost more than they're worth
- vercel.com adds 876ms and costs ~€15/month
- vercel.com adds 484ms and costs ~€8/month
- Unattributable adds 303ms and costs ~€5/month
- vercel.com adds 281ms and costs ~€5/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
vercel.com takes 876ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
vercel.com takes 484ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 303ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
vercel.com takes 281ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
100% of vercel.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev